New York primary could forecast future for Democrats. Here's what you need to know

New York Mayor Zohran Mamdani speaks during a primary night watch party for congressional candidate Claire Valdez on June 23 in the Brooklyn borough in New York City. Mamdani's three endorsed candidates all won their primaries, including Valdez. Michael M. Santiago/Getty Images hide caption toggle caption Michael M. Santiago/Getty Images Some of the most divisive issues reverberating throughout the Democratic Party were on full display in the New York primary Tuesday night. Whether it was the role of big tech in elections, views towards Israel or the appetite for generational change, voters had their say in a handful of closely watched congressional matchups. Here are some of the biggest takeaways. A big win for Mamdani Less than seven months after being sworn in as mayor, Zohran Mamdani took a big political gamble. The democratic socialist endorsed in three competitive House primary matchups, breaking with Democratic leaders by supporting leftist candidates who were unafraid to criticize Israel and push for ambitious economic policies. All three candidates won , including two candidates who challenged sitting Democratic lawmakers. "A year ago it was not the end of a political movement," Mamdani said Tuesday night, "it was the beginning." Darializa Avila Chevalier, a 32-year-old organizer and democratic socialist, delivered the biggest upset of the night. …